Good chain for large single thumper.

The chain has worked well on my 520 KTM. The bike has seen back roads and all types of off road, I ride to the trails. You need to clean it after every ride, and then use good chain lube like Bel Ray or Kal Gard.

spend the extra money on an o-ring

Comes with Riviting Master Link

The RK 520SXO chain came on my RMX250 (dirt-bike) when I bought it, and that chain has performed quite well for a couple years. So I ordered another one from Rocky Mountain to put on my XL600 (dual-sport).
In the description there is no mention of the master-link type, so I never thought of it. You can imagine my surprise when I had the bike on the stand, new sprockets installed, link removed, and then tore open the opaque (white grease covered) master-link baggie, only to find that it was a riveting-type not a clip-type master-link. And I had a ride planned for the following day. Uugh! Where was I gonna get a master-link at 1am? Well, with a little thought it turns out I had a spare for my RMX250, so I used it.